Some tropical plants have striking red veins. The veins can be prominent throughout the life span of the plant or only at certain stages. Tropical plants thrive under warm and humid conditions. Most tropical plants prefer a rich soil, however carnivorous pitcher plants are an exception because they receive their nutrients from insects and not the soil.
According to Floridata, the Firebrand or 'Red Dracena' cultivar of Cordylin fruticosa is a plant in the agave family. It is an evergreen shrub with reddish purple leaves with paler veins. The plant is a native of Southeast Asia. It is hardy in USDA Zones 10 through 12. Plant owners should prevent the plant from drying out during the summer. Outside of tropical zones, grow the plant in a container to help keep the soil moist and to maintain a high level of humidity around the plant.
Red-veined Prayer Plant
According to the University of Oklahoma's Department of Botany and Microbiology, Red-Veined Prayer Plant (Maranta leuconeura erythroneuro) is a native of Brazil. It has dark green leaves with red veins. The prayer plant grows best in a warm and shady location. The leaves are fairly broad, averaging 5 inches long and about 2 1/2 inches wide with a generally oval shape. It will develop small white flowers with a purple spot during summer months. The plant grows to about 10 inches high.
Fittonia (Fittonia albivenis) is a tropical plant, native to Peru. It has red or scarlet veins that course through olive green leaves. The plants grow to about 6 inches high. They prefer a sandy loam soil, rich with organic matter. Provide them with plenty of water during the summer months and ideally with a very humid atmosphere.
Tropical Pitcher Plant
The Monkey Cups (Nepenthes) is a native of Southeast Asia and Australia. It has long, tubular green leaves with red veins. It winds itself around other plants to help support the weight of the "pitchers." It is a carnivorous plant. It lures insects with the scent of nectar and traps them within its pitcher shaped leaves. The inside of the leaves are coated with a wax that prevents insects from gaining traction to help them escape. According to the Botanical Society of America, there are over 91 species of Nepenthes. The heights of the plant vary greatly.
Red Flash Caladium
Red flash Caladium (Caladium hortulanum) has large dark, green leaves with intense red centers with deep red veins. According to Floridata, the leaves are long, measuring 6 to 12 inches. The leaves are spotted or streaked with pink, red, gray or white. Caladiums are native to South American forests and will fare best if planted in well drained, humus rich soil. Caladiums prefer some shade in a warm location with high humidity. Red flash caladium are low growing plants, reaching only about 2 feet in height.